private Instance findLeakingReference(String key, Snapshot snapshot) {
ClassObj refClass = snapshot.findClass(KeyedWeakReference.class.getName());
List<String> keysFound = new ArrayList<>();
for (Instance instance : refClass.getInstancesList()) {
List<ClassInstance.FieldValue> values = classInstanceValues(instance);
String keyCandidate = asString(fieldValue(values, "key"));
if (keyCandidate.equals(key)) {
return fieldValue(values, "referent");
}
keysFound.add(keyCandidate);
}
throw new IllegalStateException(
"Could not find weak reference with key " + key + " in " + keysFound);
}
/**
* Bitmaps and bitmap byte arrays are sometimes held by native gc roots, so they aren't included
* in the retained size because their root dominator is a native gc root. To fix this, we check if
* the leaking instance is a dominator for each bitmap instance and then add the bitmap size.
*
* <p>From experience, we've found that bitmap created in code (Bitmap.createBitmap()) are
* correctly accounted for, however bitmaps set in layouts are not.
*/
private int computeIgnoredBitmapRetainedSize(Snapshot snapshot, Instance leakingInstance) {
int bitmapRetainedSize = 0;
ClassObj bitmapClass = snapshot.findClass("android.graphics.Bitmap");
for (Instance bitmapInstance : bitmapClass.getInstancesList()) {
if (isIgnoredDominator(leakingInstance, bitmapInstance)) {
ArrayInstance mBufferInstance = fieldValue(classInstanceValues(bitmapInstance), "mBuffer");
// Native bitmaps have mBuffer set to null. We sadly can't account for them.
if (mBufferInstance == null) {
continue;
}
long bufferSize = mBufferInstance.getTotalRetainedSize();
long bitmapSize = bitmapInstance.getTotalRetainedSize();
// Sometimes the size of the buffer isn't accounted for in the bitmap retained size. Since
// the buffer is large, it's easy to detect by checking for bitmap size < buffer size.
if (bitmapSize < bufferSize) {
bitmapSize += bufferSize;
}
bitmapRetainedSize += bitmapSize;
}
}
return bitmapRetainedSize;
}
